Fix typo in comment

Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/20210716.170209.175434392011070182.horikyota.ntt%40gmail.com

Author: petere

src/backend/utils/mb/Unicode/big5_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree big5_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/convutils.pm

@@ -579,7 +579,7 @@ sub print_radix_table
 	printf $out "  0x%02x, /* b3_3_lower */\n", $b3_3_lower;
 	printf $out "  0x%02x, /* b3_3_upper */\n", $b3_3_upper;
 	printf $out "\n";
-	printf $out "  0x%04x, /* offset of table for 3-byte inputs */\n",
+	printf $out "  0x%04x, /* offset of table for 4-byte inputs */\n",
 	  $b4root;
 	printf $out "  0x%02x, /* b4_1_lower */\n", $b4_1_lower;
 	printf $out "  0x%02x, /* b4_1_upper */\n", $b4_1_upper;

src/backend/utils/mb/Unicode/euc_cn_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree euc_cn_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/euc_jis_2004_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree euc_jis_2004_to_unicode_tree =
   0xa1, /* b3_3_lower */
   0xfe, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/euc_jp_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree euc_jp_to_unicode_tree =
   0xa1, /* b3_3_lower */
   0xfe, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/euc_kr_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree euc_kr_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/euc_tw_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree euc_tw_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x1899, /* offset of table for 3-byte inputs */
+  0x1899, /* offset of table for 4-byte inputs */
   0x8e, /* b4_1_lower */
   0x8e, /* b4_1_upper */
   0xa1, /* b4_2_lower */

src/backend/utils/mb/Unicode/gb18030_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree gb18030_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x5f3f, /* offset of table for 3-byte inputs */
+  0x5f3f, /* offset of table for 4-byte inputs */
   0x81, /* b4_1_lower */
   0x84, /* b4_1_upper */
   0x30, /* b4_2_lower */

src/backend/utils/mb/Unicode/gbk_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree gbk_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */

src/backend/utils/mb/Unicode/iso8859_10_to_utf8.map

@@ -26,7 +26,7 @@ static const pg_mb_radix_tree iso8859_10_to_unicode_tree =
   0x00, /* b3_3_lower */
   0x00, /* b3_3_upper */
 
-  0x0000, /* offset of table for 3-byte inputs */
+  0x0000, /* offset of table for 4-byte inputs */
   0x00, /* b4_1_lower */
   0x00, /* b4_1_upper */
   0x00, /* b4_2_lower */